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I have cut out a word made of 1/2″ poplar and would like to hang it in the wall. I originally thought of using my (non plunge) router with a keyhole bit to cut two keyholes, but I’m afraid that the wood would be too thin. Is there any way to do this nice other than picture hangers?

Edit:
I don’t want to glue it to the wall because that would cause too much damage to the wall. My current hair brain idea is to drill a hole with a forstner bit and then maybe use a t router bit to cut a slot for the keyhole